Regulatory function of the novel transcription factor CxrC in Penicillium oxalicum

© 2021 John Wiley & Sons Ltd..

Numerous transcription factors (TFs) in ascomycete fungi play crucial roles in cellular processes; however, how most of them function is poorly understood. Here, we identified and characterized a novel TF, CxrC (POX01387), acting downstream of the key TF CxrA, which is essential for plant-biomass-degrading-enzyme (PBDE) production in Penicillium oxalicum. Deletion of cxrC in P. oxalicum significantly affected the production of PBDEs, as well as mycelial growth and conidiospore production. CxrA directly repressed the expression of cxrC after about 12 hr following switch to Avicel culture. CxrC bound the promoters of major PBDE genes and genes involved in conidiospore development. CxrC was found to bind the TSSGTYR core sequence (S: C and G; Y: T and C; R: G and A) of the important cellulase genes cbh1 and eg1. Both N- and C-terminal peptides of CxrC and the CxrC phosphorylation were found to mediate its homodimerization. The conserved motif LPSVRSLLTP (65-74) in CxrC was found to be required for regulating cellulase production. This study reveals novel mechanisms of TF-mediated regulation of the expression of PBDE genes and genes involved in cellular processes in an ascomycete fungus.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:116

Enthalten in:

Molecular microbiology - 116(2021), 6 vom: 15. Dez., Seite 1512-1532

Sprache:

Englisch

Beteiligte Personen:

Zhang, Ting [VerfasserIn]
Mai, Rong-Ming [VerfasserIn]
Fang, Qi-Qi [VerfasserIn]
Ou, Jian-Feng [VerfasserIn]
Mo, Li-Xiang [VerfasserIn]
Tian, Di [VerfasserIn]
Li, Cheng-Xi [VerfasserIn]
Gu, Li-Sha [VerfasserIn]
Luo, Xue-Mei [VerfasserIn]
Feng, Jia-Xun [VerfasserIn]
Zhao, Shuai [VerfasserIn]

Links:

Volltext

Themen:

Cellulase
EC 3.2.1.4
Fungal Proteins
Journal Article
Penicillium oxalicum
Plant-biomass-degrading enzymes
Research Support, Non-U.S. Gov't
Transcription Factors
Transcription factor CxrC

Anmerkungen:

Date Completed 25.02.2022

Date Revised 25.02.2022

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1111/mmi.14843

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM333343859